Bulldog Gym Castle Hill was originally started in Blacktown NSW by Stuart McKinnon and Steve McKinnon in 1993, staying there for 4 years then moving to a larger more suitable facility to accommodate the ever growing clientele. Now situated in the heart of Castle Hill Bulldog Gym is a fully equipped kick boxing gym including a full-size ring, weights area, cardio machines, bags and speed balls to suit everyone from beginners wanting to learn self defence, weight loss and gain fitness to amateur and professional fighters. Bulldog Gym Castle Hill is run by World Champion brothers Stuart and Steve McKinnon.